lines=["eelrss lesser","eelrssst restless","eelrsst tressel","eelrsstvy sylvester","eelrst lester","eelrstt letters","eelrstt settler","eelrstt trestle"]
s=''
for i in range(len(lines)-1):
   line1 = lines[i].split(' ')
   line2 = lines[i+1].split(' ')
   if line1[0] != 'nm':
       if line1[0] == line2[0]:
           line3 = line1 + line2[1:]
           line2[0] = 'nm'
       else:
            line3 = line1
       line4 = ' '.join(line3)+'\n'
       s+=line4
print s

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